EP3872829B1 - Disjoncteur à gaz - Google Patents

Disjoncteur à gaz Download PDF

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Publication number
EP3872829B1
EP3872829B1 EP19877047.1A EP19877047A EP3872829B1 EP 3872829 B1 EP3872829 B1 EP 3872829B1 EP 19877047 A EP19877047 A EP 19877047A EP 3872829 B1 EP3872829 B1 EP 3872829B1
Authority
EP
European Patent Office
Prior art keywords
puffer chamber
circuit breaker
gas circuit
axis line
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19877047.1A
Other languages
German (de)
English (en)
Other versions
EP3872829A4 (fr
EP3872829A1 (fr
Inventor
Motohiro Sato
Daisaku Yamada
Yasunori Nakamura
Shimpei NAKA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP3872829A1 publication Critical patent/EP3872829A1/fr
Publication of EP3872829A4 publication Critical patent/EP3872829A4/fr
Application granted granted Critical
Publication of EP3872829B1 publication Critical patent/EP3872829B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H01H33/703—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H2033/888—Deflection of hot gasses and arcing products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/908—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7076—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by the use of special materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism

Definitions

  • the present invention relates to a gas circuit breaker that performs an opening operation for power interruption and a closing operation for power supply.
  • a conventional gas circuit breaker includes a mechanical compression chamber (mechanical puffer chamber) and a thermally pressurizing chamber (thermal puffer chamber).
  • the mechanical puffer chamber includes a mechanism that mechanically compresses an insulating gas in the mechanical puffer chamber and blows, in current interruption, the compressed insulating gas onto an arc discharge generated between contacts.
  • arc discharge an area where the arc discharge is occurring is also referred to simply as "arc discharge”.
  • the thermal puffer chamber plays a role of pressurizing the insulating gas by means of thermal energy of the arc discharge and blowing the pressurized insulating gas onto the arc discharge .
  • the thermal puffer chamber is disposed in a passage for the insulating gas that comes from the mechanical puffer chamber and thus can inhibit, in the low -current interruption duty, the pressure rise of the insulating gas in the mechanical puffer chamber. Moreover, the gas flows from the mechanical puffer chamber at a reduced speed toward the arc discharge. This may contribute to a decline in the interruption performance of the gas circuit breaker.
  • the present invention has been made to solve these problems, and an object of the present invention is to provide a gas circuit breaker that is capable of suppressing a decline in current interruption performance even in a low-current interruption duty.
  • the gas circuit breaker according to the present invention is capable of suppressing a decline in current interruption performance even in a low-current interruption duty and thus has higher current interruption performance.
  • the stationary electrode 1 is electrically connected to one terminal (not illustrated) external to the tank 10.
  • the movable electrode 2 is electrically connected to another terminal (not illustrated) external to the tank 10.
  • a space between the movable housing 3 and the movable electrode 2 serves as a first suck-out port Mnu through which the insulating gas is taken into the mechanical puffer chamber Mp and is ejected out of the mechanical puffer chamber Mp.
  • a cooling cylinder 5 is connected to the stationary electrode 1 and radiates generated heat of the stationary electrode 1 into the interior 10n of the tank 10.
  • a stationary housing 6 is attached to the cooling cylinder 5 and fits over the movable housing 3 so that the connection between the stationary electrode 1 and the movable electrode 2 is supported.
  • the stationary electrode 1, the cooling cylinder 5, and the stationary housing 6 compose a stationary part 11.
  • the movable housing 3 is a first movable housing described in the claims
  • the cylinder 8 is a second movable housing described in the claims.
  • the intake ports 7n of the nozzle 7 are four in number and each intake port 7n opens in a direction parallel to the axis line A.
  • the first suck-out port Mnu opens in a direction parallel to the axis line A.
  • the intake ports 7n illustrated in FIG. 1 face the first suck-out port Mnu.
  • FIG. 5 illustrates time dependence of parameters during the operation of the gas circuit breaker 100;
  • FIG. 5 (a) illustrates the time dependence of alternating current flowing between the stationary electrode 1 and the movable electrode 2; and
  • FIG. 5 (b) illustrates varying distance between a leading end of the stationary electrode 1 and a leading end of the movable electrode 2 (interelectrode distance D).
  • FIG. 6 is a sectional view illustrating a state of a main part of the gas circuit breaker 100 before a time T0 shown in FIG. 5 .
  • FIG. 7 is a sectional view illustrating a state of the main part of the gas circuit breaker 100 from after a time T1 through a time T2 shown in FIG. 5 .
  • FIG. 8 is a sectional view illustrating a state of the main part of the gas circuit breaker 100 from after the time T2 through the time T3 shown in FIG. 5 .
  • FIG. 9 is a cross section taken at the position along dotted-and-dashed line C2 as with FIG. 3 , illustrating the state of the gas circuit breaker 100 from after the time T2 through the time T3.
  • FIG. 10 illustrates temperature distribution of the insulating gas along the axis line A at a fixed time that comes after the time T2 and before the time T3 with a vertical axis representing temperature of the insulating gas and with a horizontal axis representing positions along the axis line A.
  • FIG. 11 is a sectional view illustrating a state of the main part of the gas circuit breaker 100 after a time T4 shown in FIG. 5 .
  • the alternating current flows steadily between the stationary electrode 1 and the movable electrode 2.
  • the interelectrode distance D illustrated in FIG. 6 is shown as a distance between the leading end of the stationary electrode 1 and the leading end of the movable electrode 2. With the stationary electrode 1 and the movable electrode 2 fitted together and touching each other at their respective leading ends, the interelectrode distance D is defined as a negative value.
  • the interelectrode distance D approximates a value of zero.
  • the interelectrode distance D is defined as a positive value.
  • a distance Dt is a length component along the axis line A between the leading end of the movable electrode 2 and center of the squirt holes 7u of the nozzle 7.
  • the interelectrode distance D is a negative value, and the stationary electrode 1 and the movable electrode 2 touch each other, the alternating current directly flows between the stationary electrode 1 and the movable electrode 2 without via an arc discharge E.
  • the interelectrode distance D becomes a positive value, and the stationary electrode 1 and the movable electrode 2 become separated. Therefore, the current flows between the stationary electrode 1 and the movable electrode 2 through the arc discharge E.
  • the insulating gas near the arc discharge E is heated, and pressure of the insulating gas increases. Accordingly, an insulating gas flow Se having a direction toward the movable housing 3 is generated in the vicinity of the arc discharge E.
  • Amount of heat generated by the arc discharge E increases with an increasing absolute value of the current.
  • the alternating current reaches maximum absolute values (a minimum current value and a maximum current value), so that the amount of heat generated by the arc discharge E increases sharply. Accordingly, the pressure of the insulating gas increases sharply, and the gas flow Se also increases sharply.
  • the gas flow Smn and the gas flow Stn similarly increase sharply. With the gas flow Smn entering the mechanical puffer chamber Mp through the first suck-out port Mnu, internal pressure of the mechanical puffer chamber Mp increases sharply. With the gas flowStn entering the first thermal puffer chamber Tp through the intake ports 7n, internal pressure of the first thermal puffer chamber Tp also increases sharply.
  • FIGS. 5 and 8 As the gas circuit breaker 100 progresses with the current interruption operation, the interelectrode distance D increases further. In other words, the volume of the mechanical puffer chamber Mp is compressed in proportion as the interelectrode distance D increases.
  • the gas flow Smu is ejected through the first suck-out port Mnu toward the intake ports 7n. For this reason, a leakage of the insulating gas through each of the intake ports 7n toward the first suck-out port Mnu is suppressed. Accordingly, volume of the gas flow Stu that squirts out through the squirt holes 7u of the nozzle 7 advantageously increases.
  • the interelectrode distance D increases further and becomes greater than the distance Dt.
  • the squirt holes 7u of the nozzle 7 pass the leading end of the stationary electrode 1. Therefore, during the movement of the movable part 21, the gas flow Stu strike the arc discharge E so that the arc discharge E is struck from sideways relative to the discharge direction.
  • the four squirt holes 7v1 to 7v4 open from the lateral side of the axis line A.
  • the opening direction v1 of the squirt hole 7v1 is not arranged in the same plane as the axis line A and is not arranged to intersect the axis line A. In other words, the opening direction v1 of the squirt hole 7v1 and the axis line A are arranged in twisted positions from each other.
  • the opening direction v2 of the squirt hole 7v2 and the axis line A are arranged in twisted positions from each other; the opening direction v3 of the squirt hole 7v3 and the axis line A are arranged in twisted positions from each other; and the opening direction v4 of the squirt hole 7v4and the axis line A are arranged in twisted positions from each other.
  • a partition 12 is formed on an inner wall surface of the movable housing 3, dividing an internal space of the movable housing 3 into the mechanical puffer chamber Mp and the second thermal puffer chamber Tp2.
  • the mechanical puffer chamber Mp is a space enclosed by the partition 12, the movable housing 3, the piston 4, and the movable electrode 2.
  • the second thermal puffer chamber Tp2 is a space enclosed with the partition 12, the movable housing 3, and the movable electrode 2.
  • the mechanical puffer chamber Mp, the second thermal puffer chamber Tp2, and the first thermal puffer chamber Tp are disposed in series along the axis line A.
  • a second suck-out port Mnv is formed on an opposite side of the partition 12 sandwiching the second thermal puffer chamber Tp2 in-between.
  • the second suck-out port Mnv serves as a passage for the insulating gas.
  • the insulating gas flows into the second thermal puffer chamber Tp2 through the second suck-out port Mnv.
  • the insulating gas also flows out of the second thermal puffer chamber Tp2 through the second suck-out port Mnv.
  • the second suck-out port Mnv is formed between the movable electrode 2 and a part of the nozzle 7 that touches the inner wall surface of the movable housing 3.

Landscapes

  • Circuit Breakers (AREA)

Claims (11)

  1. Disjoncteur à gaz (100, 101) qui inclut un réservoir (10) rempli d'un gaz isolant, le réservoir (10) comprenant :
    une électrode fixe (1) qui est conductrice ;
    une électrode mobile (2) configurée pour être mobile le long d'une ligne d'axe (A) de l'électrode fixe (1) et pour pouvoir être connectée et séparée de l'électrode fixe (1) ;
    un premier logement mobile (3) configuré pour être emboîté avec l'électrode mobile (2) et pour encercler la ligne d'axe (A) ;
    un piston (4) configuré pour former une chambre de soufflage mécanique (Mp) avec le premier logement mobile (3) ;
    un second logement mobile (8) configuré pour être emboîté avec l'électrode mobile (2) et pour être positionné en série avec le premier logement mobile (3) le long de la ligne d'axe (A) ; et
    une buse (7) configurée pour former une première chambre de soufflage thermique (Tp) avec le second logement mobile (8), dans lequel
    le premier logement mobile (3) inclut un premier orifice d'aspiration (Mnu) configuré pour permettre au gaz isolant d'être prélevé dans la chambre de soufflage mécanique (Mp) et pour permettre au gaz isolant d'être éjecté hors de la chambre de soufflage mécanique (Mp), et
    la buse (7) inclut un orifice d'admission (7n) configuré pour permettre au gaz isolant d'être prélevé dans la première chambre de soufflage thermique (Tp), et caractérisé par
    un trou de giclée (7u) configuré pour permettre au gaz isolant d'être giclé hors de la première chambre de soufflage thermique (Tp) vers une position située entre l'électrode fixe (1) et l'électrode mobile (2).
  2. Disjoncteur à gaz (100, 101, 102) selon la revendication 1, dans lequel
    une cloison (12) étant configurée pour se former sur une surface de paroi interne du premier logement mobile (3) et étant configurée pour diviser un espace intérieur du premier logement mobile (3) en la chambre de soufflage mécanique (Mp) et une seconde chambre de soufflage thermique (Tp2),
    la cloison (12) inclut le premier orifice d'aspiration (Mnu) servant de communication entre la chambre de soufflage mécanique (Mp) et la seconde chambre de soufflage thermique (Tp2),
    la chambre de soufflage mécanique (Mp) est disposée sur un côté opposé de la première chambre de soufflage thermique (Tp), intercalant la seconde chambre de soufflage thermique (Tp2) le long de la ligne d'axe (A), et
    le premier logement mobile (3) inclut un second orifice d'aspiration (Mnw) sur un côté opposé de la cloison (12), intercalant la seconde chambre de soufflage thermique (Tp2), dans lequel le second orifice d'aspiration (Mnv) est configuré pour permettre au gaz isolant d'être prélevé dans la seconde chambre de soufflage thermique (Tp2) et pour permettre au gaz isolant d'être éjecté hors de la seconde chambre de soufflage thermique (Tp2) vers une position entre l'électrode fixe (1) et l'électrode mobile (2).
  3. Disjoncteur à gaz (100, 101, 102) selon la revendication 1 ou 2, dans lequel, dans une section avec la ligne d'axe (A) vue latéralement, la chambre de soufflage mécanique (Mp) et la première chambre de soufflage thermique (Tp) sont disposées en série le long de la ligne d'axe (A).
  4. Disjoncteur à gaz (100, 101) selon la revendication 1, dans lequel le premier orifice d'aspiration (Mnu) et l'orifice d'admission (7n) se font face.
  5. Disjoncteur à gaz (100, 101, 102) selon l'une quelconque des revendications 1 à 4, dans lequel, dans un processus de déplacement de l'électrode mobile (2) à partir d'un état où l'électrode mobile (2) et l'électrode fixe (1) sont connectées, une position d'ouverture du trou de giclée (7u, 7v, 7v1 à 7v4) passe devant une extrémité avant de l'électrode fixe (1).
  6. Disjoncteur à gaz (100, 101, 102) selon l'une quelconque des revendications 1 à 5, dans lequel le trou de giclée (7u) est configuré pour s'ouvrir à partir d'un côté latéral de la ligne d'axe (A) et est configuré pour couper la ligne d'axe (A) dans un plan qui inclut la direction d'ouverture de chaque trou de giclée (7u) et la ligne d'axe (A).
  7. Disjoncteur à gaz (100, 101, 102) selon l'une quelconque des revendications 1 à 5, dans lequel le trou de giclée (7v, 7v1 à 7v4) est configuré pour s'ouvrir depuis un côté latéral de la ligne d'axe (A), et une direction d'ouverture du trou de giclée (7v, 7v 1 à 7v4) est agencée pour ne pas couper la ligne d'axe (A).
  8. Disjoncteur à gaz (100, 101, 102) selon l'une quelconque des revendications 1 à 7, dans lequel la première chambre de soufflage thermique (Tp) est formée à l'aide d'un matériau ablatif.
  9. Disjoncteur à gaz (100, 101, 102) selon l'une quelconque des revendications 1 à 7, dans lequel un matériau ablatif est disposé à l'intérieur de la première chambre de soufflage thermique (Tp).
  10. Disjoncteur à gaz (100, 101, 102) selon la revendication 8 ou 9, dans lequel le matériau ablatif est le polytétrafluoroéthylène ou un copolymère de perfluoroalkylvinyl éther.
  11. Disjoncteur à gaz (100, 101, 102) selon la revendication 8 ou 9, dans lequel le matériau ablatif est au moins un composé choisi dans le groupe consistant en un polymère perfluoroéther, un fluoroélastomère, et un polymère cyclisé 4-vinyloxy-1-butène.
EP19877047.1A 2018-10-24 2019-09-24 Disjoncteur à gaz Active EP3872829B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018200097 2018-10-24
PCT/JP2019/037360 WO2020084984A1 (fr) 2018-10-24 2019-09-24 Disjoncteur à gaz

Publications (3)

Publication Number Publication Date
EP3872829A1 EP3872829A1 (fr) 2021-09-01
EP3872829A4 EP3872829A4 (fr) 2021-12-22
EP3872829B1 true EP3872829B1 (fr) 2024-07-10

Family

ID=70330985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19877047.1A Active EP3872829B1 (fr) 2018-10-24 2019-09-24 Disjoncteur à gaz

Country Status (3)

Country Link
EP (1) EP3872829B1 (fr)
JP (1) JP6961105B2 (fr)
WO (1) WO2020084984A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2024124633A (ja) * 2023-03-03 2024-09-13 株式会社東芝 ガス遮断器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946180A (en) * 1974-04-22 1976-03-23 I-T-E Imperial Corporation Downstream injection nozzle for puffer circuit interrupter
DE2710868A1 (de) * 1977-03-12 1978-09-14 Licentia Gmbh Autopneumatischer leistungsschalter mit isolierstoffduese
JPS5916234A (ja) * 1982-07-19 1984-01-27 株式会社富士電機総合研究所 ガスしや断器のしや断室
JPS61118919A (ja) * 1984-11-14 1986-06-06 株式会社東芝 ガス絶縁遮断器
JPH04284319A (ja) * 1991-03-13 1992-10-08 Hitachi Ltd ガス遮断器
JP3132573B2 (ja) * 1991-03-18 2001-02-05 富士電機株式会社 パッファ形ガス遮断器
JP2003297200A (ja) 2002-04-01 2003-10-17 Toshiba Corp ガス遮断器
JP2012054097A (ja) * 2010-09-01 2012-03-15 Mitsubishi Electric Corp ガス遮断器
JP5328991B2 (ja) * 2010-12-07 2013-10-30 三菱電機株式会社 ガス遮断器

Also Published As

Publication number Publication date
WO2020084984A1 (fr) 2020-04-30
EP3872829A4 (fr) 2021-12-22
JPWO2020084984A1 (ja) 2021-04-30
EP3872829A1 (fr) 2021-09-01
JP6961105B2 (ja) 2021-11-05

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